# United States tariff lines under HS 2921.45

> The United States tariff splits HS 2921.45 (aromatic monoamines and their derivatives; salts thereof: 1-Naphthylamine (alpha-naphthylamine), 2-naphthylamine (beta- naphthylamine) and their derivatives; salts thereof) into 6 national lines: 2921.45.10.00 (7-Amino-1,3-naphthalenedisulfonic acid and its salts; 5-Amino-2-naphthalenesulfonic acid and its salts; 8-Amino-1-naphthalenesulfonic acid and its salts; andN-Phenyl-2-naphthylamine), 2921.45.20.00 (3-Amino-2,7-naphthalenedisulfonic acid; 4-Amino-1-naphthalenesulfonic acid, sodium salt; 5-Amino-1-naphthalenesulfonic acid (Laurent's acid); 8-Amino-2-naphthalenesulfonic acid and its salts; 7-Amino-1,3,6-naphthalenetrisulfonic acid; 8-Anilino-1-naphthalenesulfonic acid (Phenyl Peri acid) and its salts; andN-Ethyl-1-naphthylamine), 2921.45.25.00 (mixtures of 5- and 8-amino-2-naphthalene- sulfonic acid; 2-Naphthylamine-6-sulfonic acid; ando-Naphthionic acid (1-amino- 2-naphthalene- sulfonic acid)), 2921.45.60.00 (products described in additional U.S. note 3 to section VI) and 2 others. The general (MFN) duty differs by line: 6.5% on 2921.45.10.00, 5.8% on 2921.45.20.00, free on 2921.45.25.00, 6.5% on 2921.45.60.00, 6.5% on 2921.45.90.10 and 6.5% on 2921.45.90.90.

Source: https://border.bot/countries/united-states/hs-codes/292145
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 29](https://border.bot/countries/united-states/hs-codes/29) / [2921.45](https://border.bot/countries/united-states/hs-codes/292145)

## Key facts

- HS subheading: [2921.45](https://border.bot/hs-codes/292145)
- National lines: 6
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 29: Organic chemicals

## United States lines under 2921.45

The United States tariff splits HS 2921.45 (aromatic monoamines and their derivatives; salts thereof: 1-Naphthylamine (alpha-naphthylamine), 2-naphthylamine (beta- naphthylamine) and their derivatives; salts thereof) into 6 national lines: 2921.45.10.00 (7-Amino-1,3-naphthalenedisulfonic acid and its salts; 5-Amino-2-naphthalenesulfonic acid and its salts; 8-Amino-1-naphthalenesulfonic acid and its salts; andN-Phenyl-2-naphthylamine), 2921.45.20.00 (3-Amino-2,7-naphthalenedisulfonic acid; 4-Amino-1-naphthalenesulfonic acid, sodium salt; 5-Amino-1-naphthalenesulfonic acid (Laurent's acid); 8-Amino-2-naphthalenesulfonic acid and its salts; 7-Amino-1,3,6-naphthalenetrisulfonic acid; 8-Anilino-1-naphthalenesulfonic acid (Phenyl Peri acid) and its salts; andN-Ethyl-1-naphthylamine), 2921.45.25.00 (mixtures of 5- and 8-amino-2-naphthalene- sulfonic acid; 2-Naphthylamine-6-sulfonic acid; ando-Naphthionic acid (1-amino- 2-naphthalene- sulfonic acid)), 2921.45.60.00 (products described in additional U.S. note 3 to section VI) and 2 others.

The general (MFN) duty differs by line: 6.5% on 2921.45.10.00, 5.8% on 2921.45.20.00, free on 2921.45.25.00, 6.5% on 2921.45.60.00, 6.5% on 2921.45.90.10 and 6.5% on 2921.45.90.90.

- [2921.45.10.00](https://border.bot/countries/united-states/hs-codes/2921451000) Aromatic monoamines and their derivatives; salts thereof, 1-Naphthylamine (α-Naphthylamine), 2-Naphthylamine (β-Naphthylamine), and their derivatives; salts thereof, 7-Amino-1,3-naphthalenedisulfonic acid and its salts; 5-Amino-2-naphthalenesulfonic acid and its salts; 8-Amino-1-naphthalenesulfonic acid and its salts; andN-Phenyl-2-naphthylamine. Duty (MFN): 6.5%
- [2921.45.20.00](https://border.bot/countries/united-states/hs-codes/2921452000) Aromatic monoamines and their derivatives; salts thereof, 1-Naphthylamine (α-Naphthylamine), 2-Naphthylamine (β-Naphthylamine), and their derivatives; salts thereof, 3-Amino-2,7-naphthalenedisulfonic acid; 4-Amino-1-naphthalenesulfonic acid, sodium salt; 5-Amino-1-naphthalenesulfonic acid (Laurent's acid); 8-Amino-2-naphthalenesulfonic acid and its salts; 7-Amino-1,3,6-naphthalenetrisulfonic acid; 8-Anilino-1-naphthalenesulfonic acid (Phenyl Peri acid) and its salts; andN-Ethyl-1-naphthylamine. Duty (MFN): 5.8%
- [2921.45.25.00](https://border.bot/countries/united-states/hs-codes/2921452500) Aromatic monoamines and their derivatives; salts thereof, 1-Naphthylamine (α-Naphthylamine), 2-Naphthylamine (β-Naphthylamine), and their derivatives; salts thereof, Mixtures of 5- and 8-amino-2-naphthalene- sulfonic acid; 2-Naphthylamine-6-sulfonic acid; ando-Naphthionic acid (1-amino- 2-naphthalene- sulfonic acid). Duty (MFN): free
- [2921.45.60.00](https://border.bot/countries/united-states/hs-codes/2921456000) Aromatic monoamines and their derivatives; salts thereof, 1-Naphthylamine (α-Naphthylamine), 2-Naphthylamine (β-Naphthylamine), and their derivatives; salts thereof, Other, Products described in additional U.S. note 3 to section VI. Duty (MFN): 6.5%
- [2921.45.90.10](https://border.bot/countries/united-states/hs-codes/2921459010) Aromatic monoamines and their derivatives; salts thereof, 1-Naphthylamine (α-Naphthylamine), 2-Naphthylamine (β-Naphthylamine), and their derivatives; salts thereof, Other, Other, 2-Amino-1-naphthalenesulfonic acid (Tobias acid). Duty (MFN): 6.5%
- [2921.45.90.90](https://border.bot/countries/united-states/hs-codes/2921459090) Aromatic monoamines and their derivatives; salts thereof, 1-Naphthylamine (α-Naphthylamine), 2-Naphthylamine (β-Naphthylamine), and their derivatives; salts thereof, Other, Other, Other. Duty (MFN): 6.5%

## In other countries

No other national tariff on border.bot has live lines under 2921.45 yet.

- [The Harmonized System text for 2921.45](https://border.bot/hs-codes/292145)

- Previous subheading: [2921.44](https://border.bot/countries/united-states/hs-codes/292144) Diphenylamine and its derivatives; salts thereof
- Next subheading: [2921.46](https://border.bot/countries/united-states/hs-codes/292146) Amine-function compounds

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2921.45?

The United States tariff splits HS 2921.45 (aromatic monoamines and their derivatives; salts thereof: 1-Naphthylamine (alpha-naphthylamine), 2-naphthylamine (beta- naphthylamine) and their derivatives; salts thereof) into 6 national lines: 2921.45.10.00 (7-Amino-1,3-naphthalenedisulfonic acid and its salts; 5-Amino-2-naphthalenesulfonic acid and its salts; 8-Amino-1-naphthalenesulfonic acid and its salts; andN-Phenyl-2-naphthylamine), 2921.45.20.00 (3-Amino-2,7-naphthalenedisulfonic acid; 4-Amino-1-naphthalenesulfonic acid, sodium salt; 5-Amino-1-naphthalenesulfonic acid (Laurent's acid); 8-Amino-2-naphthalenesulfonic acid and its salts; 7-Amino-1,3,6-naphthalenetrisulfonic acid; 8-Anilino-1-naphthalenesulfonic acid (Phenyl Peri acid) and its salts; andN-Ethyl-1-naphthylamine), 2921.45.25.00 (mixtures of 5- and 8-amino-2-naphthalene- sulfonic acid; 2-Naphthylamine-6-sulfonic acid; ando-Naphthionic acid (1-amino- 2-naphthalene- sulfonic acid)), 2921.45.60.00 (products described in additional U.S. note 3 to section VI) and 2 others.

### What is the duty on HS 2921.45 in the United States?

The general (MFN) duty differs by line: 6.5% on 2921.45.10.00, 5.8% on 2921.45.20.00, free on 2921.45.25.00, 6.5% on 2921.45.60.00, 6.5% on 2921.45.90.10 and 6.5% on 2921.45.90.90.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/292145.json